#include<stdio.h>
#include<unistd.h>
int main()
{
  printf("process is running...\n");
  //execl("/usr/bin/ls","ls","--color=auto","-a","-l",NULL);
  execlp("ls","ls","-a","-l","--color=auto",NULL);
  //execl("/usr/bin/ls","ls",NULL);
  //execl("/usr/bin/ls","ls",NULL);
  printf("process running done...\n");
  return 0;
}
